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facf0c92e0
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464 lines
12 KiB
C
464 lines
12 KiB
C
/* librep format strings.
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Copyright (C) 2001-2004, 2006-2007, 2009, 2019-2020, 2023 Free Software Foundation, Inc.
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Written by Bruno Haible <haible@clisp.cons.org>, 2001.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdbool.h>
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#include <stdlib.h>
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#include "format.h"
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#include "c-ctype.h"
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#include "xalloc.h"
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#include "xvasprintf.h"
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#include "format-invalid.h"
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#include "gettext.h"
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#define _(str) gettext (str)
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/* librep format strings are implemented in librep-0.14/src/streams.c.
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A directive
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- starts with '%' or '%m$' where m is a positive integer,
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- is optionally followed by any of the characters '-', '^', '0', '+', ' ',
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each of which acts as a flag,
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- is optionally followed by a width specification: a nonempty digit
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sequence,
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- is optionally followed by '.' and a precision specification: a nonempty
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digit sequence,
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- is finished by a specifier
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- '%', that needs no argument,
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- 'c', that need a character argument,
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- 'd', 'x', 'X', 'o', that need an integer argument,
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- 's', that need an argument and prints it using princ,
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- 'S', that need an argument and prints it using prin1.
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Numbered ('%m$') and unnumbered argument specifications can be used in the
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same string. The effect of '%m$' is to set the current argument number to
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m. The current argument number is incremented after processing a directive.
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*/
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enum format_arg_type
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{
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FAT_NONE,
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FAT_CHARACTER,
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FAT_INTEGER,
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FAT_OBJECT_PRETTY,
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FAT_OBJECT
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};
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struct numbered_arg
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{
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unsigned int number;
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enum format_arg_type type;
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};
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struct spec
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{
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unsigned int directives;
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unsigned int numbered_arg_count;
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struct numbered_arg *numbered;
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};
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/* Locale independent test for a decimal digit.
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Argument can be 'char' or 'unsigned char'. (Whereas the argument of
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<ctype.h> isdigit must be an 'unsigned char'.) */
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#undef isdigit
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#define isdigit(c) ((unsigned int) ((c) - '0') < 10)
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static int
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numbered_arg_compare (const void *p1, const void *p2)
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{
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unsigned int n1 = ((const struct numbered_arg *) p1)->number;
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unsigned int n2 = ((const struct numbered_arg *) p2)->number;
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return (n1 > n2 ? 1 : n1 < n2 ? -1 : 0);
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}
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static void *
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format_parse (const char *format, bool translated, char *fdi,
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char **invalid_reason)
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{
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const char *const format_start = format;
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struct spec spec;
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unsigned int numbered_allocated;
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struct spec *result;
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unsigned int number;
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spec.directives = 0;
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spec.numbered_arg_count = 0;
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spec.numbered = NULL;
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numbered_allocated = 0;
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number = 1;
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for (; *format != '\0';)
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if (*format++ == '%')
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{
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/* A directive. */
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enum format_arg_type type;
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FDI_SET (format - 1, FMTDIR_START);
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spec.directives++;
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if (isdigit (*format))
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{
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const char *f = format;
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unsigned int m = 0;
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do
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{
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m = 10 * m + (*f - '0');
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f++;
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}
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while (isdigit (*f));
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if (*f == '$' && m > 0)
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{
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number = m;
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format = ++f;
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}
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}
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/* Parse flags. */
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while (*format == '-' || *format == '^' || *format == '0'
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|| *format == '+' || *format == ' ')
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format++;
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/* Parse width. */
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if (isdigit (*format))
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{
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do format++; while (isdigit (*format));
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}
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/* Parse precision. */
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if (*format == '.')
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{
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format++;
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if (isdigit (*format))
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{
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do format++; while (isdigit (*format));
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}
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}
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switch (*format)
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{
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case '%':
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type = FAT_NONE;
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break;
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case 'c':
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type = FAT_CHARACTER;
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break;
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case 'd': case 'x': case 'X': case 'o':
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type = FAT_INTEGER;
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break;
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case 's':
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type = FAT_OBJECT_PRETTY;
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break;
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case 'S':
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type = FAT_OBJECT;
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break;
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default:
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if (*format == '\0')
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{
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*invalid_reason = INVALID_UNTERMINATED_DIRECTIVE ();
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FDI_SET (format - 1, FMTDIR_ERROR);
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}
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else
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{
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*invalid_reason =
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INVALID_CONVERSION_SPECIFIER (spec.directives, *format);
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FDI_SET (format, FMTDIR_ERROR);
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}
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goto bad_format;
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}
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if (type != FAT_NONE)
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{
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if (numbered_allocated == spec.numbered_arg_count)
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{
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numbered_allocated = 2 * numbered_allocated + 1;
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spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, numbered_allocated * sizeof (struct numbered_arg));
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}
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spec.numbered[spec.numbered_arg_count].number = number;
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spec.numbered[spec.numbered_arg_count].type = type;
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spec.numbered_arg_count++;
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number++;
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}
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FDI_SET (format, FMTDIR_END);
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format++;
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}
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/* Sort the numbered argument array, and eliminate duplicates. */
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if (spec.numbered_arg_count > 1)
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{
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unsigned int i, j;
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bool err;
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qsort (spec.numbered, spec.numbered_arg_count,
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sizeof (struct numbered_arg), numbered_arg_compare);
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/* Remove duplicates: Copy from i to j, keeping 0 <= j <= i. */
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err = false;
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for (i = j = 0; i < spec.numbered_arg_count; i++)
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if (j > 0 && spec.numbered[i].number == spec.numbered[j-1].number)
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{
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enum format_arg_type type1 = spec.numbered[i].type;
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enum format_arg_type type2 = spec.numbered[j-1].type;
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enum format_arg_type type_both;
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if (type1 == type2)
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type_both = type1;
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else
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{
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/* Incompatible types. */
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type_both = FAT_NONE;
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if (!err)
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*invalid_reason =
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INVALID_INCOMPATIBLE_ARG_TYPES (spec.numbered[i].number);
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err = true;
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}
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spec.numbered[j-1].type = type_both;
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}
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else
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{
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if (j < i)
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{
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spec.numbered[j].number = spec.numbered[i].number;
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spec.numbered[j].type = spec.numbered[i].type;
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}
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j++;
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}
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spec.numbered_arg_count = j;
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if (err)
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/* *invalid_reason has already been set above. */
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goto bad_format;
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}
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result = XMALLOC (struct spec);
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*result = spec;
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return result;
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bad_format:
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if (spec.numbered != NULL)
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free (spec.numbered);
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return NULL;
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}
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static void
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format_free (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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if (spec->numbered != NULL)
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free (spec->numbered);
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free (spec);
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}
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static int
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format_get_number_of_directives (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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return spec->directives;
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}
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static bool
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format_check (void *msgid_descr, void *msgstr_descr, bool equality,
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formatstring_error_logger_t error_logger,
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const char *pretty_msgid, const char *pretty_msgstr)
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{
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struct spec *spec1 = (struct spec *) msgid_descr;
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struct spec *spec2 = (struct spec *) msgstr_descr;
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bool err = false;
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if (spec1->numbered_arg_count + spec2->numbered_arg_count > 0)
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{
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unsigned int i, j;
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unsigned int n1 = spec1->numbered_arg_count;
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unsigned int n2 = spec2->numbered_arg_count;
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/* Check that the argument numbers are the same.
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Both arrays are sorted. We search for the first difference. */
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for (i = 0, j = 0; i < n1 || j < n2; )
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{
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int cmp = (i >= n1 ? 1 :
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j >= n2 ? -1 :
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spec1->numbered[i].number > spec2->numbered[j].number ? 1 :
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spec1->numbered[i].number < spec2->numbered[j].number ? -1 :
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0);
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if (cmp > 0)
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{
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if (error_logger)
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error_logger (_("a format specification for argument %u, as in '%s', doesn't exist in '%s'"),
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spec2->numbered[j].number, pretty_msgstr,
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pretty_msgid);
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err = true;
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break;
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}
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else if (cmp < 0)
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{
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if (equality)
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{
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if (error_logger)
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error_logger (_("a format specification for argument %u doesn't exist in '%s'"),
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spec1->numbered[i].number, pretty_msgstr);
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err = true;
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break;
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}
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else
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i++;
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}
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else
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j++, i++;
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}
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/* Check the argument types are the same. */
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if (!err)
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for (i = 0, j = 0; j < n2; )
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{
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if (spec1->numbered[i].number == spec2->numbered[j].number)
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{
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if (spec1->numbered[i].type != spec2->numbered[j].type)
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{
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if (error_logger)
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error_logger (_("format specifications in '%s' and '%s' for argument %u are not the same"),
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pretty_msgid, pretty_msgstr,
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spec2->numbered[j].number);
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err = true;
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break;
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}
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j++, i++;
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}
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else
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i++;
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}
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}
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return err;
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}
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struct formatstring_parser formatstring_librep =
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{
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format_parse,
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format_free,
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format_get_number_of_directives,
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NULL,
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format_check
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};
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#ifdef TEST
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/* Test program: Print the argument list specification returned by
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format_parse for strings read from standard input. */
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#include <stdio.h>
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static void
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format_print (void *descr)
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{
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struct spec *spec = (struct spec *) descr;
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unsigned int last;
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unsigned int i;
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if (spec == NULL)
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{
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printf ("INVALID");
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return;
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}
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printf ("(");
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last = 1;
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for (i = 0; i < spec->numbered_arg_count; i++)
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{
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unsigned int number = spec->numbered[i].number;
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if (i > 0)
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printf (" ");
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if (number < last)
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abort ();
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for (; last < number; last++)
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printf ("_ ");
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switch (spec->numbered[i].type)
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{
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case FAT_CHARACTER:
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printf ("c");
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break;
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case FAT_INTEGER:
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printf ("i");
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break;
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case FAT_OBJECT_PRETTY:
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printf ("s");
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break;
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case FAT_OBJECT:
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printf ("*");
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break;
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default:
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abort ();
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}
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last = number + 1;
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}
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printf (")");
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}
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int
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main ()
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{
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for (;;)
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{
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char *line = NULL;
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size_t line_size = 0;
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int line_len;
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char *invalid_reason;
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void *descr;
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line_len = getline (&line, &line_size, stdin);
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if (line_len < 0)
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break;
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if (line_len > 0 && line[line_len - 1] == '\n')
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line[--line_len] = '\0';
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invalid_reason = NULL;
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descr = format_parse (line, false, NULL, &invalid_reason);
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format_print (descr);
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printf ("\n");
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if (descr == NULL)
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printf ("%s\n", invalid_reason);
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free (invalid_reason);
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free (line);
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}
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return 0;
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}
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/*
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* For Emacs M-x compile
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* Local Variables:
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* compile-command: "/bin/sh ../libtool --tag=CC --mode=link gcc -o a.out -static -O -g -Wall -I.. -I../gnulib-lib -I../../gettext-runtime/intl -DHAVE_CONFIG_H -DTEST format-librep.c ../gnulib-lib/libgettextlib.la"
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* End:
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*/
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#endif /* TEST */
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